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A frictionless piston-cylinder based enclosure contains some amount of gas at a pressure of 400 kPa . Then heat is transferred fo the gas at constant pressure in a quasi-static process. The piston moves up slowly through a height of 10 cm . If the piston has a cross-sectional area of 0.3 m ², the work done by the gas in this process is

Options

  1. A6 kJ
  2. B12 kJ
  3. C7.5 kJ
  4. D24 kJ

Correct answer

B. 12 kJ

Step-by-step solution

W_ constant pressure =p V=400 10³ 0.3 10 10⁻²=400 10 3=12000=12 kJ

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